Floating dry-dock.



No. 7l3,947. Patented Nov. l8, I902.

G. A. BBONDEB. FLOATING DRY DOCK.

(Application filed May 6, 1901.) (No Model.) 5 Shade-Shoot l.

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No. 713,947. Patented Nov. I8. I902.

G. A. BRONDEB.

FLOATING DRY DOCK.

(Application fllegi m 6, 1901.)

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No. 713,947. Patented Nov. I8, I902.

G. A. BRUNDER.

FLOATING DRY DOCK.

(Application filed May 6, 1901.

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(No Model.)

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Nu. 7|3,947. Patent ed Nov. l-8, I902.

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FLOATING DRY DOCK.

(Application filed May 6, 1901.) (No Model.) 5 Shet-Shoet 4.

N0. 7l3,947. Patented NOV. l8, I902.

G. A. BRONDER'. FLOATING DRY DOCK.

(Application filed May 6, 1901.) (No Model.) I 5 Sheets-Sheet 5.

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UNrrno STATES PATENT OFFICE.

GASTON A. BRONDER, OF BROOKLYN, NEW YORK.

FLOATING DRY-DOCK.

SPECIFICATION forming part of Letters Patent No. 718,947, dated November18, 1902.

Application filed May 6. 1901. Serial No. 58,934- (life model.)

To aZZ whom it may concern:

Be it known that I, GASTON A. BRONDER, a citizen of the United States,and a resident of the borough of Brooklyn, in the county of Kings andState of New York, have invented certain new and useful Improvements inFloating Dry-Docks, of which the following is a specification.

This invention relates to floating dry-docks of composite construction,comprising steel, iron, and wood. Its object is the production of afloating dry-dock which combines the strength of an iron and steelstructure with the advantages of wooden planking, and among its novelfeatures may be mentioned the method employed of fastening the woodenstringers and girders to the iron and steel frames, the longitudinalbulkhead consisting of a riveted plate-girder with its top and bottomreinforcing-plates, steel Outriggers projecting from the ends of thepontoon, and the iron gutters at the sides of the deck-planking of thepontoon.

Figure 1 represents a vertical cross-sectin of the dock on the line 00a: of Fig. 2. Fig. 2 shows a fragmentary top plan View of the dock. Fig.3 is a sectional elevation of the dock on the line w 00' of Fig. 2. Fig.4 represents a section through one side of the pontoon on the line x xof Fig. 2. Fig. 5 isa side View of Fig. 4. Fig. 6 shows a fragmentaryend view of a side of the pontoon. Fig. 7 represents a fragmentary endview of the pontoon, showing the location of the gutter. Fig. 8 is asection on line y y of Fig. 4. Fig. 9 shows a section on the line 3 11of Fig. 6. Fig. 10 represents a vertical cross-section through thecentral longitudinal bulkhead. Fig. 11 is a section on line t t of Fig.10. Fig. 12 shows a section on line .9 s of Fig. 10. Fig. 13 representsa top view of the framing of the Outriggers. Fig. 14 is an elevation ofFig. 13. Fig. 15 shows a section on the line V V of Fig. 13. Fig. 16 isa partial end View of Fig. 14. Fig. 17 represents a section of Fig. 13on the line V V.

Referring to Figs. 1, 2, and 3, the dock is shown to consist of thepontoon A, with towers B, engine-house C, with engine D and itsappurtenances to operate the pumps E and E opposite the severalcompartments which are formed by the cross-bulkheads F F, &c.,

and the longitudinal bulkhead F. The pumps E operate on the compartmentson the right of the longitudinal bulkhead F and the pumps E on the leftof the same through the sluices F The pumps are operatedby the engine Dthrough the pitinen d, balance-beams d, and plunger rods d Inletopenings are shown at Q. with their flooding-valves Q, 0perated by therods R with hand-wheels R. At G are shown guidingshelves for the spilesG. On top of the cross-frames A are bolted wooden stringers A to whichare spiked the deck-planks A which carry the bilge-block guides A forthe movable bilge-blocks I I, the said guides extending from the guttersS S to the keel-blocks H, the latter resting on the fore-and-aftstringers 7t.

To the bottom of the cross-frames A are bolted the wooden stringers o towhich is spiked the bottom planking a Hatches are shown at A andventilating-openings at A and A to A. The openings A in the outriggersare provided for shipping and nnshipping rudders.

Referring to Figs. 4 to 9, the sides of the steel cross-frames consistof the plates 1, to which are rivetedthe angles 2 and the plates and 37,and the wooden stringers 3 are bolted to the said frames with the bolts4. The planking 5 is spiked to the stringers 3 and is edge-bolted withthe blunt bolts 36. The deck planking A is spiked to the stringers A andthe latter are bolted to the angles 15 with the bolts 7. The bottomplanking a is spiked to the stringers a and the latter are bolted to theangles 18 with the bolts 38. Angles I (see Fig. 4) run the whole lengthof the sides of the pontoon, and the reinforcing-stringers L are boltedto the same with bolts 9. The stringers 3 are framed into L, and bolts Zsecure the stringerL to the angle 2, the bolts 9 also securing thecorner-logs J to the stringers'L. The bottom stringers K are bolted tothe corner-logs J with the bolts 10. The said logs J are further securedby the diagonal bolts 11, which pass through filling-pieces M, locatedbetween the frames, which latter are also secured to the stringers Kwith bolts 12. The top corner-logs N are supported by the stringers O,which latter are bolted to the plates 20 and angles 21 with The saidcorner-logs N are fasthe bolts 22.

ing together.

tened to the plates and angles 23 with bolts 24, and blunt bolts 25secure them to the top angle-irons 26. Diagonal bolts 27 tie the logs Nto fi1ling-pieces P. The effect of the diagonal bolts 11 and 27, on thebottom and top corner-logs, is to constitute them wedges, for thepurpose of pressing the plank- The vertical corner-logs T (see Fig. 9)are bolted to end frame-bulkheads 30 by means of the angles 31 32 withthe bolts 33 and 34, and the side planking 5 which rabbet into thecorner logs T are bolted through and through with bolts 35 to thecorher-logs T and angles 32.

It will be noticed that the structure com prises, first, essentially, asteel frame to which wooden stringers are bolted, constituting a Woodenframe on the outside of the steel frame, and to the latter is spiked theplanking, combining in one construction the advantages'of the strengthof a steel structure and the advantage of spiked planking, which caneasily be renewed without disturbing the main structure of the dock.

Referring to Figs. 10 to 12, the central bulkhead is shown at F with itssupportingangles friveted to the plates f on the top and 14: on thebottom. Angles 15 on each side are riveted to plate f and the angles 18are riveted to the plates 14. The angles f, which run from the bottom ofplate 14 to the top of plate f are riveted'together and bolted to thelongitudinalbulkhead F at the crossing of each frame, at the top andbottom. The longitudinal bulkhead F is stiffened by plates f and f ontop and bottom, which are riveted to the angles 18 and 15, and thebottom plate is again stiflened by angles f riveted to the edges of theaforesaid plate f Diagonal braces f which are stiffened by angles f topand bottom, are secured to the plates f and 14.

Referring to Figs. 13 to 17, the outriggerframes are fastened to the endbulkheads 30 and consist of two fore-and-aft truss-frames 40, to the topof which are fastened cross-supports 41, which latter are diagonallybraced from the foot of the braces 40 with the diago nal braces 4.2. l

Having described my invention, I desire to secure by United StatesLetters Patent and claim 1. A pontoon consisting of the combination of ametallic framework, wooden stringers bolted thereto constituting awooden frame on the outside of the steel framework, planking spiked tosaid stringers, and means for compressing the planks against each other.

2. In a pontoon consisting of steel frames,

a wooden frame bolted on the outside of the steel frames, plankingspiked to the wooden frame, gutters S taking the place of some of theplanking and bolted to the pontoon.

3. In a pontoon, having an outer surface of planking, logs at thecorners of the pontoon and pressing against said planking, stringers Kand L, behind said planking and bearing against said 1ogs,filling-pieces bearing against said stringers K and L and bolts for pressingsaid planking together, and passing through said logs and saidfilling-pieces.

4.. In a pontoon having two series of parallel angle-iron frames,connected by a bulkhead, plates f and f at the top and bottom of saidbulkhead secured .to and connecting the two series of frames, andmetallic plates 20 and 37 securing together the outer ends of themembers of each series of frames, and end bulkheads closing the ends ofsaid pontoon, and Outriggers riveted to said end bulkheads for thepurpose described and openings in the Outriggers.

5. In a dry-dock, a pontoon consisting of the combination of a series ofsubstantially rectangular parallel metallic frames, the top, bottom andoutward sides of each frame consisting of a plate, angles fastenedtoopposite sides of the said plate and at the edges thereof, metallicplates 20 and 37 connecting said frames together at given intervals, asecond series of similar frames similarly connected together, a bulkheadrunning transversely to said frames, and between the two series,metallic plates f and f at the lower and top edges of said bulkhead, andsecured to both said bulkhead and to said frames, wooden stringersbolted lengthwise of and on the outside of the angle-irons of saidframes, planking spiked transversely to said stringers to form theoutside surface of said pontoon, logs bearing against said planking atthe corners of said pontoon, longitudinal stringers bearing against saidlogs, and running transversely of said frames and fastened thereto,filling-pieces bearing upon said stringers K and L, tightening-boltspassing through said logs and said filling-pieces for wedging andpressing said planking together, bolts connecting said logs to saidstringers K and L, and metallic end bulkheads closing the ends of thepontoon.

Signed at New York, in the county of New York and State of New York,this 26th day of April, A. D. 1901.

GASTON A. BRONDER. LL. 8.]

Witnesses:

WALTER B. PIERSON, WILLIAM P. FRAND.

